Patent US3007090A successfully refreshed from Google Patents.
US3007090A
Expired / Lapsed
US
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Back resistance control for junction semiconductor devices
Assignee: International Business Machines Corp
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Filing: 1957-09-04
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Granted: 1961-10-31
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Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Richard F Rutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/60; G; G01; G01R; G01R31/00; G01R31/26; H10D10/00; H10D62/10; H10D62/117; H10D99/00; H10P; H10P95/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2666814A
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US2561411A
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US2740076A
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US2725315A
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US2868683A
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US2874341A
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US2770761A
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US2943006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |